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physical and chemical changes (physical (examples (crushing a can, melting…
physical and chemical changes
physical
A change that changes physical property but does not change the substance.
change shape, size and form
most could be undone.
most can go vice versa
still have the same properties
Can seperate quite easily
they are pretty obvious
examples
crushing a can
melting an ice cube
boiling water
mixing sand and water
breaking glass
dissolving sugar in water
dissolving salt and water
shredding paper
chopping a tree
smashing a watermelon
making mash potato
chemical
A change that changes the substance and cannot be undone(THEY MIGHT WITH OTHER CHEMICALS)
cannot be undone unless with other chemicals
May produce gas and odor
leaves clues or indicators
May leave physical changes
could possibly change color
examples
Baking a cake
fireworks exploding
burning wood
firing clay
grilling steak
vinegar and baking soda
NaCl
H2O
digesting food
heating sugar to form caramel
Mixing acid and base
Iron rusting
smelting sand to glass
Atom
facts